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COBALTITE , a See also:mineral with the See also:composition CoAsS, See also:cobalt sulpharsenide. It is found as granular to compact masses, and frequently as beautifully See also:developed crystals, which have the same symmetry as the isomorphous mineral See also:pyrites, being cubic with parallel hemihedrism. The usual forms are the See also:cube, See also:octahedron and pentagonal See also:dodecahedron {210}. The See also:colour is See also:silver-See also:- WHITE
- WHITE, ANDREW DICKSON (1832– )
- WHITE, GILBERT (1720–1793)
- WHITE, HENRY KIRKE (1785-1806)
- WHITE, HUGH LAWSON (1773-1840)
- WHITE, JOSEPH BLANCO (1775-1841)
- WHITE, RICHARD GRANT (1822-1885)
- WHITE, ROBERT (1645-1704)
- WHITE, SIR GEORGE STUART (1835– )
- WHITE, SIR THOMAS (1492-1567)
- WHITE, SIR WILLIAM ARTHUR (1824--1891)
- WHITE, SIR WILLIAM HENRY (1845– )
- WHITE, THOMAS (1628-1698)
- WHITE, THOMAS (c. 1550-1624)
white with a reddish tinge, and the lustre brilliant and metallic, hence the old name cobalt-glance; the streak is greyish-See also:black. The mineral is brittle, and possesses distinct cleavages parallel to the faces of the cube; hardness 51; specific gravity 6.2. The brilliant crystals from Tunaberg in Sodermanland and Hakansboda in Vestmanland, See also:Sweden, and from Skutterud near See also:Drammen in See also:Norway are well known in mineral collections. The cobalt ores at these localities occur with pyrites and chalcopyrite as bands in See also:gneiss. Crystals have also been found at Khetri in See also:Rajputana, and under the name sehta the mineral is used by See also:Indian jewellers for producing a See also:blue See also:enamel on See also:gold and silver ornaments. Massive cobaltite has been found in small amount in the Botallack mine, See also:Cornwall. A variety containing much See also:iron replacing cobalt, and known as ferrocobaltite (Ger. Stahlkobalt), occurs at See also:Siegen in See also:Westphalia. (L. J.
End of Article: COBALTITE
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